织梦cms怎么循环调取所有栏目及栏目子类

{dede:channelartlist typeid='top'}<li class="clearfix"><span><a target="_blank" title="{dede:field name='typename'/}" href="{dede:field name='typeurl'/}">{dede:field name='typename'/}</a></span><P>{dede:channel type='sun' row='20' noself='yes'}<a target="_blank" title="[field:typename/]" href="[field:typeurl/]">[field:typename/]</a>{/dede:channel}</P></li>{/dede:channelartlist}